I'm planning on setting up a 75 gallon tank. I'm going to be planting with cryps, java fern and pogostemons stellatus octopus. Using the tank to breed mystery snails, cherry shrimp, bristlenose(maybe) and guppies or platys. My question is would 2 co-op medium with usb pumps be sufficient or should I opt to get the large size with the usb pumps?